Beautifully said. Sometimes my students mistake someone's willingness to inflict pain with prowess. When I start to get irritated, I remember making that same assumption myself. Early on, I was so happy when one of the brown belts would crush me. I thought it was because he thought I was "good" and "I could take it." One of the black belts set me straight. He said, "He doesn't care whether he hurts you or not as long as his technique works. That's a problem, not a compliment."